Documentation Source Text

Check-in [2bb38606e0]
Login

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Continuing work on the bubble syntax diagrams.
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 2bb38606e0cd20d0011d15e9e7ad1c9bd81a7e9a
User & Date: drh 2008-10-01 17:25:48
Context
2008-10-01
19:48
Continuing work on the syntax bubble diagrams. check-in: f73a84dfb0 user: drh tags: trunk
17:25
Continuing work on the bubble syntax diagrams. check-in: 2bb38606e0 user: drh tags: trunk
2008-09-29
20:57
Continuing work on the syntax bubble-diagram generator. check-in: effc38b25c user: drh tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to art/syntax/bubble-generator.tcl.

10
11
12
13
14
15
16








17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37









38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
..
57
58
59
60
61
62
63

64
65

66


67
68
69
70













































71
72
73
74
75
76
77
..
79
80
81
82
83
84
85




86
87
88
89
90
91
92
...
139
140
141
142
143
144
145



146
147
148
149
150
151
152
...
282
283
284
285
286
287
288

289


290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
...
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339

















































340
341
342
343
344
345
346
...
487
488
489
490
491
492
493



494
495
496
497
498
499
500
...
514
515
516
517
518
519
520









canvas .c -bg white
pack .c -side top -fill both -expand 1
wm withdraw .

# Graphs:
#
set all_graphs {








  create-table-stmt {
    stack
       {line CREATE {or {} TEMP TEMPORARY} TABLE}
       {opt {line IF NOT EXISTS}}
       {line {opt {line database-name .}} table-name}
       {tailbranch
          {line ( {loop column-def ,} {loop {} {, constraint}} )}
          {line AS select}
       }
  }
  create-table-stmt-long {
    stack
       {line CREATE {or {} TEMP TEMPORARY} TABLE {opt {line IF NOT EXISTS}}}
       {line {opt {line database-name .}} table-name
          {tailbranch
            {line ( {loop column-def ,} {loop {} {, constraint}} )}
            {line AS select}
          }
       }
  }
  column-def {









    line column-name {or
        {}
        {line type-name}
        {line type-name ( number )}
        {line type-name ( number , number )}
    } {loop {} column-constraint}
  }
  column-def-b {
    line column-name {opt
        {line type-name 
            {opt
               {line ( number {opt {line , number}} )}
            }
        }
    } {loop {} column-constraint}
................................................................................
      {or
         {line PRIMARY KEY conflict-clause {opt AUTOINCREMENT}}
         {line NOT NULL conflict-clause}
         {line UNIQUE conflict-clause}
         {line CHECK ( expr )}
         {line DEFAULT {or value {line ( expr )}}}
         {line COLLATE collation-name}

      }
  }

  constraint {


     or
       {line {or {line PRIMARY KEY} UNIQUE}
             ( column-list ) conflict-clause}
       {line CHECK ( expr )}













































  }
  conflict-clause {
    opt {line ON CONFLICT {or ROLLBACK ABORT FAIL IGNORE REPLACE}}
  }
}

# Draw the button bar
................................................................................
set bn 0
foreach {name graph} $all_graphs {
  incr bn
  set b .bb.b$bn
  button $b -text $name -command [list draw_graph $name $graph]
  pack $b -side top -fill x -expand 1
}





set tagcnt 0                      ;# tag counter
set font1 {Helvetica 16 bold}     ;# default token font
set font2 {Helvetica 15}          ;# default variable font
set RADIUS 13                     ;# default turn radius
set DPI 80                        ;# dots per inch

................................................................................

# Draw a bubble containing $txt. 
#
proc draw_bubble {txt} {
  global tagcnt
  incr tagcnt
  set tag x$tagcnt



  if {[regexp {^[a-z]} $txt]} {
    set font $::font2
    set istoken 0
  } else {
    set font $::font1
    set istoken 1
  }
................................................................................
      set back_y [expr {$btm + $sep + 1}]
      .c move $t $enter_x $enter_y
      set e2 [expr {$exit_x + $sep}]
      .c create line $exit_x $exit_y $e2 $exit_y \
            -width 2 -tags $tag
      draw_right_turnback $tag $e2 $exit_y $back_y
      set e3 [expr {$enter_x-$sep}]

      .c create line $e2 $back_y $e3 $back_y \


                 -width 2 -tags $tag
      set r2 [expr {($enter_y - $back_y)/2.0}]
      draw_left_turnback $tag $e3 $back_y $enter_y
      .c create line $e3 $enter_y $enter_x $enter_y \
                 -arrow last -width 2 -tags $tag
      set exit_x [expr {$enter_x + $exx}]
      set exit_y [expr {$enter_y + $exy}]
    }
    .c addtag $tag withtag $t
    .c dtag $t $t
    set btm [lindex [.c bbox $tag] 3]
  }
  set width [lindex [.c bbox $tag] 2]
  return [list $tag $width $exit_y]
}

proc draw_loop {forward back} {
  global tagcnt
  incr tagcnt
  set tag x$tagcnt
  set sep $::RADIUS
  set vsep [expr {$sep/2}]

  foreach {ft fexx fexy} [draw_line $forward] break
  foreach {fx0 fy0 fx1 fy1} [.c bbox $ft] break
  set fw [expr {$fx1-$fx0}]
  foreach {bt bexx bexy} [draw_backwards_line $back] break
  foreach {bx0 by0 bx1 by1} [.c bbox $bt] break
  set bw [expr {$bx1-$bx0}]
  set dy [expr {$fy1 - $by0 + $vsep}]
  .c move $bt 0 $dy
................................................................................

  if {$fw>$bw} {
    set dx [expr {($fw-$bw)/2}]
    .c move $bt $dx 0
    set bexx [expr {$dx+$bexx}]
    .c create line 0 $biny $dx $biny -width 2 -tags $bt
    .c create line $bexx $bexy $fx1 $bexy -width 2 -tags $bt -arrow first
    set mxx $fx1
  } elseif {$bw>$fw} {
    set dx [expr {($bw-$fw)/2}]
    .c move $ft $dx 0
    set fexx [expr {$dx+$fexx}]
    .c create line 0 0 $dx $fexy -width 2 -tags $ft
    .c create line $fexx $fexy $bx1 $fexy -width 2 -tags $ft
    set mxx $bx1

















































  }
  .c addtag $tag withtag $bt
  .c addtag $tag withtag $ft
  .c dtag $bt $bt
  .c dtag $ft $ft
  .c move $tag $sep 0
  set mxx [expr {$mxx+$sep}]
................................................................................
  }
  if {$cmd=="stack"} {
    return [draw_stack [lrange $spec 1 end]]
  }
  if {$cmd=="loop"} {
    return [draw_loop [lindex $spec 1] [lindex $spec 2]]
  }



  if {$cmd=="or"} {
    return [draw_or [lrange $spec 1 end]]
  }
  if {$cmd=="opt"} {
    return [draw_or [list {} [lindex $spec 1]]]
  }
  if {$cmd=="tailbranch"} {
................................................................................
  .c config -width $x1 -height $y1
  update
  .c postscript -file $name.ps -width $x1 -height $y1
  global DPI
  exec convert -density ${DPI}x$DPI -antialias $name.ps $name.gif
  exec xv $name.gif &
}
















>
>
>
>
>
>
>
>
|





|
|


|




|
|




>
>
>
>
>
>
>
>
>







|







 







>
|
|
>
|
>
>
|
|
|
|
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>







 







>
>
>
>







 







>
>
>







 







>
|
>
>













|









|







 







|






|
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>







 







>
>
>







 







>
>
>
>
>
>
>
>
>
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
..
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
...
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
...
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
...
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
...
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
...
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
...
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
canvas .c -bg white
pack .c -side top -fill both -expand 1
wm withdraw .

# Graphs:
#
set all_graphs {
  alter-table-stmt {
    stack
       {line ALTER TABLE {opt {line database-name .}} table-name}
       {tailbranch
          {line RENAME TO new-table-name}
          {line ADD {opt COLUMN} column-def}
       }
  }
  X-create-table-stmt-1 {
    stack
       {line CREATE {or {} TEMP TEMPORARY} TABLE}
       {opt {line IF NOT EXISTS}}
       {line {opt {line database-name .}} table-name}
       {tailbranch
          {line ( {loop column-def ,} {loop {} {, table-constraint}} )}
          {line AS select-stmt}
       }
  }
  create-table-stmt {
    stack
       {line CREATE {or {} TEMP TEMPORARY} TABLE {opt {line IF NOT EXISTS}}}
       {line {opt {line database-name .}} table-name
          {tailbranch
            {line ( {loop column-def ,} {loop {} {, table-constraint}} )}
            {line AS select-stmt}
          }
       }
  }
  column-def {
    line column-name {or type-name nil} {loop {} column-constraint}
  }
  type-name {
     line {loop name {}} {or {}
        {line ( number )}
        {line ( number , number )}
     }
  }
  X-column-def-c {
    line column-name {or
        {}
        {line type-name}
        {line type-name ( number )}
        {line type-name ( number , number )}
    } {loop {} column-constraint}
  }
  X-column-def-b {
    line column-name {opt
        {line type-name 
            {opt
               {line ( number {opt {line , number}} )}
            }
        }
    } {loop {} column-constraint}
................................................................................
      {or
         {line PRIMARY KEY conflict-clause {opt AUTOINCREMENT}}
         {line NOT NULL conflict-clause}
         {line UNIQUE conflict-clause}
         {line CHECK ( expr )}
         {line DEFAULT {or value {line ( expr )}}}
         {line COLLATE collation-name}
         {line foreign-key-clause}

      }
  }
  table-constraint {
     stack
       {opt {line CONSTRAINT name}}
       {or
          {line {or {line PRIMARY KEY} UNIQUE}
                ( column-list ) conflict-clause}
          {line CHECK ( expr )}
          {line FOREIGN KEY ( column-list ) foreign-key-clause }
       }
  }
  foreign-key-clause {
      stack 
        {line REFERENCES foreign-table {opt {line ( column-list )}}}
        {toploop
           {or
              {line ON {or DELETE UPDATE INSERT}
                       {or {line SET NULL} {line SET DEFAULT}
                           CASCADE RESTRICT
                       }
              }
              {line MATCH name}
              nil
           }
           {}
        }
        {or
          {line {opt NOT} DEFERRABLE 
             {or 
                {}
                {line INITIALLY DEFERRED}
                {line INITIALLY IMMEDIATE}
             }
          }
          nil
        }
  }
  X-foreign-key-action {
      or
         {line MATCH name}
         {line ON {or DELETE UPDATE INSERT}
                  {or {line SET NULL} {line SET DEFAULT}
                      CASCADE RESTRICT
                  }
         }
  }
  X-foreign-key-deferment {
     line {opt NOT} DEFERRABLE 
          {or 
              {}
              {line INITIALLY DEFERRED}
              {line INITIALLY IMMEDIATE}
          }
  }
  conflict-clause {
    opt {line ON CONFLICT {or ROLLBACK ABORT FAIL IGNORE REPLACE}}
  }
}

# Draw the button bar
................................................................................
set bn 0
foreach {name graph} $all_graphs {
  incr bn
  set b .bb.b$bn
  button $b -text $name -command [list draw_graph $name $graph]
  pack $b -side top -fill x -expand 1
}
incr bn
set b .bb.b$bn
button $b -text Everything -command {draw_all_graphs}
pack $b -side top -fill x -expand 1

set tagcnt 0                      ;# tag counter
set font1 {Helvetica 16 bold}     ;# default token font
set font2 {Helvetica 15}          ;# default variable font
set RADIUS 13                     ;# default turn radius
set DPI 80                        ;# dots per inch

................................................................................

# Draw a bubble containing $txt. 
#
proc draw_bubble {txt} {
  global tagcnt
  incr tagcnt
  set tag x$tagcnt
  if {$txt=="nil"} {
    return [list $tag 0 0]
  }
  if {[regexp {^[a-z]} $txt]} {
    set font $::font2
    set istoken 0
  } else {
    set font $::font1
    set istoken 1
  }
................................................................................
      set back_y [expr {$btm + $sep + 1}]
      .c move $t $enter_x $enter_y
      set e2 [expr {$exit_x + $sep}]
      .c create line $exit_x $exit_y $e2 $exit_y \
            -width 2 -tags $tag
      draw_right_turnback $tag $e2 $exit_y $back_y
      set e3 [expr {$enter_x-$sep}]
      set emid [expr {($e2+$e3)/2}]
      .c create line $e2 $back_y $emid $back_y \
                 -width 2 -tags $tag -arrow last
      .c create line $emid $back_y $e3 $back_y \
                 -width 2 -tags $tag
      set r2 [expr {($enter_y - $back_y)/2.0}]
      draw_left_turnback $tag $e3 $back_y $enter_y
      .c create line $e3 $enter_y $enter_x $enter_y \
                 -arrow last -width 2 -tags $tag
      set exit_x [expr {$enter_x + $exx}]
      set exit_y [expr {$enter_y + $exy}]
    }
    .c addtag $tag withtag $t
    .c dtag $t $t
    set btm [lindex [.c bbox $tag] 3]
  }
  set width [lindex [.c bbox $tag] 2]
  return [list $tag $exit_x $exit_y]
}

proc draw_loop {forward back} {
  global tagcnt
  incr tagcnt
  set tag x$tagcnt
  set sep $::RADIUS
  set vsep [expr {$sep/2}]

  foreach {ft fexx fexy} [draw_diagram $forward] break
  foreach {fx0 fy0 fx1 fy1} [.c bbox $ft] break
  set fw [expr {$fx1-$fx0}]
  foreach {bt bexx bexy} [draw_backwards_line $back] break
  foreach {bx0 by0 bx1 by1} [.c bbox $bt] break
  set bw [expr {$bx1-$bx0}]
  set dy [expr {$fy1 - $by0 + $vsep}]
  .c move $bt 0 $dy
................................................................................

  if {$fw>$bw} {
    set dx [expr {($fw-$bw)/2}]
    .c move $bt $dx 0
    set bexx [expr {$dx+$bexx}]
    .c create line 0 $biny $dx $biny -width 2 -tags $bt
    .c create line $bexx $bexy $fx1 $bexy -width 2 -tags $bt -arrow first
    set mxx $fexx
  } elseif {$bw>$fw} {
    set dx [expr {($bw-$fw)/2}]
    .c move $ft $dx 0
    set fexx [expr {$dx+$fexx}]
    .c create line 0 0 $dx $fexy -width 2 -tags $ft
    .c create line $fexx $fexy $bx1 $fexy -width 2 -tags $ft
    set mxx $bexx
  }
  .c addtag $tag withtag $bt
  .c addtag $tag withtag $ft
  .c dtag $bt $bt
  .c dtag $ft $ft
  .c move $tag $sep 0
  set mxx [expr {$mxx+$sep}]
  .c create line 0 0 $sep 0 -width 2 -tags $tag
  draw_left_turnback $tag $sep 0 $biny
  draw_right_turnback $tag $mxx $fexy $bexy
  foreach {x0 y0 x1 y1} [.c bbox $tag] break
  .c create line $mxx $fexy $x1 $fexy -width 2 -tags $tag
  return [list $tag $x1 $fexy]
}

proc draw_toploop {forward back} {
  global tagcnt
  incr tagcnt
  set tag x$tagcnt
  set sep $::RADIUS
  set vsep [expr {$sep/2}]

  foreach {ft fexx fexy} [draw_diagram $forward] break
  foreach {fx0 fy0 fx1 fy1} [.c bbox $ft] break
  set fw [expr {$fx1-$fx0}]
  foreach {bt bexx bexy} [draw_backwards_line $back] break
  foreach {bx0 by0 bx1 by1} [.c bbox $bt] break
  set bw [expr {$bx1-$bx0}]
  set dy [expr {-($by1 - $fy0 + $vsep)}]
  .c move $bt 0 $dy
  set biny $dy
  set bexy [expr {$dy+$bexy}]
  set by0 [expr {$dy+$by0}]
  set by1 [expr {$dy+$by1}]

  if {$fw>$bw} {
    set dx [expr {($fw-$bw)/2}]
    .c move $bt $dx 0
    set bexx [expr {$dx+$bexx}]
    .c create line 0 $biny $dx $biny -width 2 -tags $bt
    .c create line $bexx $bexy $fx1 $bexy -width 2 -tags $bt -arrow first
    set mxx $fexx
  } elseif {$bw>$fw} {
    set dx [expr {($bw-$fw)/2}]
    .c move $ft $dx 0
    set fexx [expr {$dx+$fexx}]
    .c create line 0 0 $dx $fexy -width 2 -tags $ft
    .c create line $fexx $fexy $bx1 $fexy -width 2 -tags $ft
    set mxx $bexx
  }
  .c addtag $tag withtag $bt
  .c addtag $tag withtag $ft
  .c dtag $bt $bt
  .c dtag $ft $ft
  .c move $tag $sep 0
  set mxx [expr {$mxx+$sep}]
................................................................................
  }
  if {$cmd=="stack"} {
    return [draw_stack [lrange $spec 1 end]]
  }
  if {$cmd=="loop"} {
    return [draw_loop [lindex $spec 1] [lindex $spec 2]]
  }
  if {$cmd=="toploop"} {
    return [draw_toploop [lindex $spec 1] [lindex $spec 2]]
  }
  if {$cmd=="or"} {
    return [draw_or [lrange $spec 1 end]]
  }
  if {$cmd=="opt"} {
    return [draw_or [list {} [lindex $spec 1]]]
  }
  if {$cmd=="tailbranch"} {
................................................................................
  .c config -width $x1 -height $y1
  update
  .c postscript -file $name.ps -width $x1 -height $y1
  global DPI
  exec convert -density ${DPI}x$DPI -antialias $name.ps $name.gif
  exec xv $name.gif &
}

proc draw_all_graphs {} {
  global all_graphs
  foreach {name graph} $all_graphs {
    if {[regexp {^X-} $name]} continue
    draw_graph $name $graph
  }
  wm withdraw .
}